So no surprise that I need to have one of my engineer friends machine an additional adapter to accommodate the 10mm hole in the prop.

The 8mm prop adapter shaft is to short to just sleeve it to 10mm, so I need to adapt the 10mm prop adapter that belongs to a 63 series motor (with a much wider bolt spread).

On a separate note, I am having an internal argument with myself whether the wings need additional reinforcement.

With the curve of the airfoil and the inner rib, the wing seems pretty sturdy and stiff, but obviously I can grab the end and twist it/bend it, but not a lot.

I am planning on using 3mm CF tubing to add struts like the JJ, but with more than glue attaching them to the plane - is this going to be enough? How about two per side?

My second thought, but obviously not the only other option, is to add a second layer to about 40% of cord on the bottom of the wings forming a KFm airfoil with the hope that besides adding strength it would also add lift and lower the stall speed - thoughts?

Personally, I think that since the plane is gonna be a slow flyer the added weight and strength of the extra foam won't be needed....but...at the same time a KFM 5a would give it a good amount of additional strength. But at that size and speed I believe you won't get much benefit in lift from the KFM piece. These are just my opinions, someone else with more experience could tell you more correctly what would be better to do.

Images

You paid how much for that piece of junk!?......just kidding....looks like you got your moneys worth, and that's just by looking at the picture. I bet it is even better holding it in your hands. And I'm sure you had a hard time taking it out of your hands to set it down long enough to take the picture.

A quick eyeball estimate by holding the prop/motor assembly in the partially assembled fuselage indicates (surprisingly) that the firewall will be in the same location indicated in the enlarged drawing.